[v4] genirq: Add support for percpu_devid IRQ affinity

[PATCH v4 20/26] coresight: trbe: Request specific affinities for percpu IRQ

Posted by Marc Zyngier 1 month, 3 weeks ago

Let the TRBE driver request IRQs with an affinity mask matching
the TRBE implementation affinity.

Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 8f17160fec442..9f64f463339d6 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1494,7 +1494,8 @@ static int arm_trbe_probe_irq(struct platform_device *pdev,
 	if (!drvdata->handle)
 		return -ENOMEM;
 
-	ret = request_percpu_irq(drvdata->irq, arm_trbe_irq_handler, DRVNAME, drvdata->handle);
+	ret = request_percpu_irq_affinity(drvdata->irq, arm_trbe_irq_handler, DRVNAME,
+					  affinity, drvdata->handle);
 	if (ret) {
 		free_percpu(drvdata->handle);
 		return ret;
-- 
2.47.3

Re: [PATCH v4 20/26] coresight: trbe: Request specific affinities for percpu IRQ

Posted by Jonathan Cameron 1 month ago

On Mon, 20 Oct 2025 13:29:37 +0100
Marc Zyngier <maz@kernel.org> wrote:

> Let the TRBE driver request IRQs with an affinity mask matching
> the TRBE implementation affinity.
> 
> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Tested-by: Will Deacon <will@kernel.org>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
FWIW given how simple this is.
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

[tip: irq/core] coresight: trbe: Request specific affinities for per CPU interrupts

Posted by tip-bot2 for Marc Zyngier 1 month, 2 weeks ago

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     4cdf4813f528cdadfc3778fed6b7783cfe1eb75a
Gitweb:        https://git.kernel.org/tip/4cdf4813f528cdadfc3778fed6b7783cfe1eb75a
Author:        Marc Zyngier <maz@kernel.org>
AuthorDate:    Mon, 20 Oct 2025 13:29:37 +01:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 27 Oct 2025 17:16:36 +01:00

coresight: trbe: Request specific affinities for per CPU interrupts

Let the TRBE driver request interrupts with an affinity mask matching the
TRBE implementation affinity.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Will Deacon <will@kernel.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://patch.msgid.link/20251020122944.3074811-21-maz@kernel.org
---
 drivers/hwtracing/coresight/coresight-trbe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 8f17160..9f64f46 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1494,7 +1494,8 @@ static int arm_trbe_probe_irq(struct platform_device *pdev,
 	if (!drvdata->handle)
 		return -ENOMEM;
 
-	ret = request_percpu_irq(drvdata->irq, arm_trbe_irq_handler, DRVNAME, drvdata->handle);
+	ret = request_percpu_irq_affinity(drvdata->irq, arm_trbe_irq_handler, DRVNAME,
+					  affinity, drvdata->handle);
 	if (ret) {
 		free_percpu(drvdata->handle);
 		return ret;